Vinyl If you work, study or game for hours at a time then a normal desk chair just doesn't provide enough comfort. Take your seating to the next level and invest in this adjustable, executive swivel chair that is versatile enough for office or home use. [_Our chair conforms to ANSI/BIFMA standard X5.1-17_] Ventilated curved back provides lumbar support and breathability 360° Swivel seat allows you to reach multiple areas while seated Tilt lever - push in to lock in an upright position; pullout to activate rocking motion, while tilt tension knob controls tilt resistance PRODUCT MEASUREMENTS: Overall Size: 25.75"W x 25"D x 39-42.75"H; Seat Size: 21"W x 20"D x 17.5-21.75"H; Back Size: 21.75"W x 24"H; Arm Size: 27-33.5"H from floor; 9.25-12"H from seat